Distance from x 2 by mitchs (alt)

import re,os
s=re.sub
a=s('o','-',os.read(0,109))
for d in range(20):d/=2;a=s('x|\.(?=(|[^z]{10})%s)'%~-d,`d`,a[::-1])
print a

Note that non-ascii characters in the above source code will be escaped (such as \x9f).

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